Description
The new MD490 designed engines have the following features:(1) Through simulation test for engine body, small curve surface is added to big curve surface of each cylinder skirt and thickness of bottom plate is incresed, which have greatly raised rigidity of engine body and reduced vibration, noise, so performance of motor has been raised and usage life been prolonged. (2) In line with suggestions of AVL co., spiral intake passage has been redesigned and direct-injection combustion chamber have been adopted, which have reduced oil consumption, improved emission level and starting performance in low temperature.